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Machinability Index Formula

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Machinability Index of A Material is used to compare the machinability of different materials by quantifying the relative machinability of a different materials. Check FAQs

I = V cut \cdot \frac{100}{V s}

I - Machinability Index of A Material?V_cut - Cut Velocity?V_s - Cutting Speed of Free-Cutting Steel?

Machinability Index Example

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Here is how the Machinability Index equation looks like with Values.

Here is how the Machinability Index equation looks like with Units.

Here is how the Machinability Index equation looks like.

124.7499 = 0.8317 \cdot \frac{100}{0.6667}

124.7499 = 0.8317m/s \cdot \frac{100}{0.6667m/s}

124.7499 = 0.8317 \cdot \frac{100}{0.6667}

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Machinability Index Solution

Follow our step by step solution on how to calculate Machinability Index?

FIRST Step Consider the formula

I = V cut \cdot \frac{100}{V s}

Next Step Substitute values of Variables

∴

I = 0.8317m/s \cdot \frac{100}{0.6667m/s}

Next Step Prepare to Evaluate

∴

I = 0.8317 \cdot \frac{100}{0.6667}

Next Step Evaluate

∴

I = 124.749937675031

LAST Step Rounding Answer

∴

I = 124.7499

Machinability Index Formula Elements

Variables

Machinability Index of A Material

Machinability Index of A Material is used to compare the machinability of different materials by quantifying the relative machinability of a different materials.

Symbol: I

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Machinability Index of A Material

Cut Velocity

The Cut Velocity is the tangential velocity at the periphery of the cutter or workpiece (whichever is rotating).

Symbol: V_cut

Measurement: SpeedUnit: m/s

Note: Value should be greater than 0.

Formulas to find Cut Velocity

Cutting Speed of Free-Cutting Steel

Cutting Speed of Free-Cutting Steel is the speed of cutting used when operating on a standard workpiece made of standard cutting steel.

Symbol: V_s

Measurement: SpeedUnit: m/s

Note: Value should be greater than 0.

Formulas to find Cutting Speed of Free-Cutting Steel

Other formulas in Cutting Velocity category

Go Resultant Cutting Velocity

V r = \frac{v c}{\cos ((η))}

Go Crater Depth for Sintered-Carbide Tools

K t = 0.06 + 0.3 \cdot f r

Go Feed for Sintered-Carbide Tools using Crater Depth

f r = \frac{K t - 0.06}{0.3}

Go Cutting Velocity using Taylor's Tool Life and Intercept

V' cut = \frac{X}{{T v}^{x}}

How to Evaluate Machinability Index?

Machinability Index evaluator uses Machinability Index of A Material = Cut Velocity*100/Cutting Speed of Free-Cutting Steel to evaluate the Machinability Index of A Material, The Machinability Index is defined as the percentage ratio of Cutting Velocity on the material to that used on a Standard Free-Cutting Steel. It is usually calculated for an average speedof Cut spread over a time span of 20 min. Machinability Index of A Material is denoted by I symbol.

How to evaluate Machinability Index using this online evaluator? To use this online evaluator for Machinability Index, enter Cut Velocity (V_cut) & Cutting Speed of Free-Cutting Steel (V_s) and hit the calculate button.

FAQs on Machinability Index

What is the formula to find Machinability Index?

The formula of Machinability Index is expressed as Machinability Index of A Material = Cut Velocity*100/Cutting Speed of Free-Cutting Steel. Here is an example- 124.75 = 0.831666667*100/0.666667.

How to calculate Machinability Index?

With Cut Velocity (V_cut) & Cutting Speed of Free-Cutting Steel (V_s) we can find Machinability Index using the formula - Machinability Index of A Material = Cut Velocity*100/Cutting Speed of Free-Cutting Steel.

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Machinability Index Formula

Machinability Index Example

Machinability Index Solution

Machinability Index Formula Elements

Other formulas in Cutting Velocity category

How to Evaluate Machinability Index?

FAQs on Machinability Index

Variable Name